Volume of Fresh Frozen Plasma (FFP)
A single unit of fresh frozen plasma contains approximately 300 ml 1.
Key Volume and Dosing Information
The standard FFP unit volume is consistently reported as approximately 300 ml per bag across current guidelines 1.
Therapeutic Dosing
The recommended therapeutic dose for FFP administration is 15 ml/kg body weight 1. This dosing strategy is designed to achieve a minimum of 30% plasma factor concentration, which is the threshold needed for effective hemostatic correction 2.
For practical application:
- Standard adult dosing: 10-15 ml/kg FFP typically achieves therapeutic levels 2
- Urgent warfarin reversal: A lower dose of 5-8 ml/kg FFP usually suffices when prothrombin complex concentrate (PCC) is unavailable 2
- For a 70 kg adult: This translates to approximately 1,050 ml (roughly 3-4 units of FFP) for standard therapeutic dosing
Important Clinical Considerations
Storage and handling parameters matter for volume calculations:
- Thawed FFP can be stored at 4°C for up to 24 hours (extended to 5 days for major trauma-associated hemorrhage) 1
- Once removed from refrigeration, FFP must be used within 30 minutes 1
- Never refreeze thawed FFP 1
Comparison with Other Blood Products
For context on coagulation factor content:
- Four units of FFP (approximately 1,200 ml) contain roughly 2 g of fibrinogen 1
- Two pools of cryoprecipitate (200-400 ml total) contain approximately 4 g of fibrinogen—double the fibrinogen content in half the volume 1
This volume information is critical for calculating appropriate transfusion requirements in major hemorrhage protocols, where balanced ratios of FFP to red blood cells (typically 1:1 or 1:1.5) are recommended until coagulation test results become available 3.